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Error: -6000, -77 when opening a company file

When attempting to open a company file, the following error appears:

We're sorry.  QuickBooks encountered a problem.  Error codes: (-6000, -77).

How to fix it

Intuit recommends several solutions for this problem. The first solution may solve your problem, or you may need to try all of them to resolve the issue. For best results, perform the solutions in the order shown.


Quick tip
  • Re-launching QuickBooks Desktop with elevated permissions may resolve the issue. Right-click the QuickBooks Desktop icon on your desktop and select Run as Administrator.
  • If the company file is saved on an external drive, copy the company file locally.


Solution 1: Download and run the QuickBooks File Doctor

Solution 2: Rename .ND and .TLG files

.ND and .TLG are configuration files that allow QuickBooks Desktop to access the company file(s) in a network or in multi-user mode. Corrupted or damaged .ND or .TLG files can cause errors when opening QuickBooks Desktop. Renaming these files does not cause data loss since these are automatically recreated when you open the company file or scan the company files using QuickBooks Database Server Manager.


  1. Open the folder that contains your company file.
  2. Find the files with the same file name as your company file but with extensions .ND and .TLG.
  3. Right click .nd/.tlg file and select Rename. Add the word ".old" after the file extension and press enter.

Solution 3: Use UNC path instead of mapped drive

  1. Right-click the QuickBooks icon on your desktop, press and hold the Ctrl key from your keyboard and select Run as Administrator. Hold down the Ctrl key until you have the No Company Open window.
    Note: Holding down the Ctrl key prevents QuickBooks Desktop from autopening a company file.
  2. From the File menu, click Open or Restore Company.
  3. Select Open a company file and click Next.
  4. In the left Pane, click Network and navigate to the location of your company file.
    Note: If you can't find the folder where the company file saved, you may need to set folder permissions.
  5. Select the company file and click Open.

Solution 4: Configure firewall and security software

Solution 5: Recreate damaged folder

  1. Create a new folder on your C:\ drive.
  2. Open the folder where the company file is saved.
  3. Locate the .qbw file.
  4. Right-click the .qbw file and select Copy.
  5. Open the new folder, right-click and select Paste.
  6. Set folder permissions.
  7. Open QuickBooks Desktop and open the file from the new location.
KB ID# SLN40284
4/30/2017 11:22:05 PM
QYPPRDQBKSWS03 9138 Pro 2017 0e1ad9